The year is 1978 and the Marauders — James Potter, Sirius Black, Peter Pettigrew, and Remus Lupin — have just graduated from Hogwarts.

Writer and director Justin Zagri told BuzzFeed, "I did a poll on our Facebook page with a few story options, and it was almost unanimous that the fans wanted a story about the Marauders. So, I read the books again, did some research, and came up with a story that I feel had something to say, while making sure we got to know both Snape and the Marauders when they were transitioning into adults, and how events of their past helped shape their future."

James Potter reflects on the influence that Lily Evans has had on him.

Angry at Severus for calling Lily a "mudblood," James is ready for a fight.

The young men all head to the forest, where a battle begins.

The entire film was shot in four days, but the postproduction effort took about a year to complete. Zagri told BuzzFeed, "It's a slow but rewarding process, as you get to see every piece slowly come together. Each shot of visual effects that came in was really fun. Jake Akuna, Navid Sanati, Amy Carpenter, Michael Davidson, and Julian Rodriguez did an amazing job."

We also get a first glimpse of Peter Pettigrew being turned into Wormtail.